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Vulnerability record · CVE-2018-12121 · published 28 November 2018

CVE-2018-12121: Nodejs node.js uncontrolled resource consumption vulnerability

Nodejs · Node.Js

Node.js: All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0: Denial of Service with large HTTP headers: By using a combination of many requests with maximum sized headers (almost 80 KB per connection), and carefully timed completion of the headers, it is possible to cause the HTTP server to abort from heap allocation failure. Attack potential is mitigated by the use of a load balancer or other proxy layer.

7.5 CVSS 3.1 High EPSS 10% · top 4.5% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score, v2 5.0
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
13References
17 Jun 2026Last modified by NVD

Description

Node.js: All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0: Denial of Service with large HTTP headers: By using a combination of many requests with maximum sized headers (almost 80 KB per connection), and carefully timed completion of the headers, it is possible to cause the HTTP server to abort from heap allocation failure. Attack potential is mitigated by the use of a load balancer or other proxy layer.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/106043 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:1821 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2258 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3497 Third Party Advisory
https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/ PatchVendor Advisory
https://security.gentoo.org/glsa/202003-48 Third Party Advisory
http://www.securityfocus.com/bid/106043 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:1821 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2258 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3497 Third Party Advisory
https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/ PatchVendor Advisory
https://security.gentoo.org/glsa/202003-48 Third Party Advisory
https://security.netapp.com/advisory/ntap-20241227-0008/

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Source: NIST National Vulnerability Database (record CVE-2018-12121), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.